Starting from the nostrils, trace the path in sequence which the inspired air takes until it reaches the air sacs.

Identify the correct sequence through which the inhaled air moves?

Starting from the pioneer species, trace the sequence that follows in an ecological succession on a bare rock, until climax community is reached in an ecosystem. Name this type of succession.

The speed of sound in air is 330 m s^(-1) and in water is 1650 m s^(-1) . It takes 2 s for sound to reach a certain distance from the source placed in air. How much time will it take for sound to reach the same distance when the source is in water ?

The path through which the air travels to the lungs is called the respiratory tract.

In lungs, the inspired air ultimately reaches to ...................

The diagram below shows a point source P inside a water container. Four rays A, B, C, D starting from the source P are shown up to the water surface. Show in the diagram the path of these rays after striking the water surface. The critical angle for water air surface is 48^(@) .

A: The passage starting with the external nostrils upto the terminal bronchiole constitute the respiratory part. R: The respiratory part transport the air to the alveoli, clears it from the foreign material, humidified and brings the air to body temperature.

Two sound waves, originating from the same source, travel along different paths in air and then meet at a point. If the source vibrates at a frequency of 1.0 kHz and one path is 83 cm longer than the other, what will be the nature of interference? The speed of sound in air is 332 ms^-1 .

A particle (m = 1kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2m). After reaching C, the particle continues to move freely in air as a projectile. When it reaches point C (height 1 m), the vertical speed of the particle (in m/s) is (Figure drawn is schematic and not to scale , take g = 9.8 m/ sec^(2) ) [Take ]

A particle (m = 1kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2m). After reaching C, the particle continues to move freely in air as a projectile. When it reaches point C (height 1 m), the vertical speed of the particle (in m/s) is (Figure drawn is schematic and not to scale , take g = 9.8 m/ sec^(2) ) [Take ]